As your trusted partner we continually work to provide you with the best service and value. With the disruption to our members caused by the COVID-19 pandemic, we have taken the decision to delay the retirement of this service until 2022.
URIBL data and Spamhaus data will remain in place until:
19 August 2022 - URIBL data will no longer be available
21 October 2022 - Spamhaus data will no longer be available, and the service will formally close
Please check back for further updates.
About allow and deny lists
Access our copies of several leading DNS allow and deny lists in order to protect your users from email abuse.
Deny lists will enable you to block 'unwanted' email, while at the other end of the spectrum, allow lists will allow 'wanted' email to get through to end-users.
This service takes feeds from the following reputable lists:
Three Spamhaus lists (SBL, XBL and PBL) plus these lists joined together as a Zen list
The Spamhaus allow list
The multi.uribl.com URIBL list
The dnswl.org allow list
DNS list profiles
We recommend that you use the Spamhaus sender lists in the first phase. In the second stage filter, the URIBL list can help to locate many of the otherwise difficult, remaining unwanted messages.
DNS deny lists are a well-established technique that identify sources of email abuse as lists of IP address blocks, enabling Janet-connected organisations to quickly and easily reject a high proportion of unwanted email.
Unlike most deny lists, URIBLs are not lists of message senders but URLs (web addresses, some but not all representing undesirable sites) which have been seen in email messages and have been identified as spam or phishing, or are otherwise malicious.
Links seen in these messages are more stable than the rapidly changing botnet IP addresses used to send the vast majority of them.
Allow lists contain all currently known trusted email servers, and are the opposite of deny lists. Email from listed email addresses, domains and/or IP address should generally be allowed through the mail server.
Email allow lists are used to reduce the incidence of false positives and to speed up the filtering process, as they are often based on the assumption that most legitimate mail will be from a relatively small and fixed set of senders.
Service level description
This is an email abuse protection service to assist electronic mail systems at organisations to determine if they should refuse connections from certain addresses. The system is based on data from reputable sources and provides DNS-style resolution.
This service is centrally-funded.
You are responsible for ensuring that the email system at the organisation is configured to use the service.
You are also responsible on an ongoing basis for maintaining contact details.
Please ensure your organisation understands and adheres to the security policy.
Hours of service
The service is available 24 hours a day, seven days a week, all year.
The target availability is 99.5% during the hours of service defined above, measured monthly over a 12 month period, excluding service-affecting maintenance.
Service-affecting maintenance is capped at 0.5% and is normally carried out with at least two weeks' notice.
Faults with the service may be reported via the service desk on tel: 0300 300 2212 or via email: email@example.com.